A moving target: trade-offs between maximizing carbon and minimizing hydraulic stress for plants in a changing climate

IF 8.3 1区 生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2024-09-26 DOI:10.1111/nph.20127
Gregory R. Quetin, Leander D. L. Anderegg, Indra Boving, Anna T. Trugman
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移动的目标:在不断变化的气候中,植物在最大限度地增加碳和最小限度地减少水力压力之间的权衡。
观察证据表明,树木的叶面积可能会随着水分供应量的变化而变化,以减轻水力压力。然而,驱动叶面积变化的基本机制以及不同叶面积分配策略的后果仍然未知。在这里,我们使用了一个基于性状的水力支持树木模型,该模型有两种末端成员叶面积分配策略,旨在最大化碳增益或缓和水力压力。我们研究了这些策略对未来植物压力和生产力的影响。在二氧化碳含量较高的情况下,分配叶面积以最大限度地增加碳增量可提高生产力,但会系统性地增加水力压力。在某些地区,为避免未来水力压力增加而采取的分配策略错过了 26% 的未来潜在净初级生产力。与地球系统模型(ESM)的预测相反,两种末端分子叶面积分配策略都导致了未来气候情景下叶面积的减少。叶面积适应以避免增加的水力压力(以及潜在的加速死亡风险)是可能的,但会导致碳增量减少。在地球系统模式中考虑植物水力对树冠适应性的影响,可以限制或扭转目前对未来叶面积增加的预测,从而对碳和水循环以及地表能量预算产生影响。
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来源期刊
New Phytologist
New Phytologist 生物-植物科学
自引率
5.30%
发文量
728
期刊介绍: New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.
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